Sony is rumored to unveil the Xperia Z1S on 12nd of November, as well as another device codenamed Xperia Taichi. The event will be held in Shanghai and both new Xperia Z1S and Xperia Taichi will go official on that day.

However, no word on the Xperia Z1S. The Xperia Z1S may be the international version of Xperia Z1 f or T-Mobile version Xperia Z1. There's a higher probability that the Xperia Z1S is the international version of Xperia Z1 f as the smaller brother of Xperia Z1 already undergone several benchmark tests, which showed that it easily will be the best performer in the mini league.

Specs wise, the Xperia Z1S is expected to pack a 4.3" HD display, Snapdragon 800 SoC, 20.7 MP camera with Sony G-Lens and BIONZ image processing, as well as a 2,300 mAh battery.

While the Xperia Taichi is a mid-range phablet that compete the Nokia Lumia 1320. The phablet will feature 6" 720p HD display and a true octa-core MediaTek processor, other specs are still unclear.

The official announcement of both Xperia devices is unconfirmed, so just take this rumor with a pinch of salt. Stay tuned for more upcoming news of the Xperia smartphones.